do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 usercopy: Kernel memory overwrite attempt detected to spans multiple pages (offset 0, size 64)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 17307 Comm: syz-executor5 Not tainted 4.19.0-rc2+ #50 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90 Code: c0 e8 8a 23 b2 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 80 48 15 88 ff 75 d0 41 57 e8 5a 38 98 ff <0f> 0b e8 5f 23 b2 ff e8 8a 6e f5 ff 8b 95 5c fe ff ff 4d 89 e0 31 RSP: 0018:ffff88019b5ced50 EFLAGS: 00010086 RAX: 000000000000005f RBX: ffffffff881545a0 RCX: ffffc9000909e000 RDX: 0000000000000000 RSI: ffffffff8164f825 RDI: 0000000000000005 RBP: ffff88019b5ceda8 R08: ffff8801b94e2400 R09: fffffbfff12b29d4 R10: fffffbfff12b29d4 R11: ffffffff89594ea3 R12: ffffffff88154ac0 R13: ffffffff881546e0 R14: ffffffff881545a0 R15: ffffffff881545a0 FS: 00007fdb72a11700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000140 CR3: 00000001d09ec000 CR4: 00000000001406e0 Call Trace: check_page_span mm/usercopy.c:212 [inline] check_heap_object mm/usercopy.c:241 [inline] __check_object_size.cold.2+0x23/0x134 mm/usercopy.c:266 check_object_size include/linux/thread_info.h:119 [inline] __copy_from_user_inatomic include/linux/uaccess.h:65 [inline] __probe_kernel_read+0xda/0x1c0 mm/maccess.c:33 show_opcodes+0x4c/0x70 arch/x86/kernel/dumpstack.c:109 show_ip+0x31/0x36 arch/x86/kernel/dumpstack.c:126 show_iret_regs+0x14/0x38 arch/x86/kernel/dumpstack.c:131 __show_regs+0x1c/0x60 arch/x86/kernel/process_64.c:72 show_regs_if_on_stack.constprop.10+0x36/0x39 arch/x86/kernel/dumpstack.c:149 show_trace_log_lvl+0x25d/0x28c arch/x86/kernel/dumpstack.c:274 show_stack+0x38/0x3a arch/x86/kernel/dumpstack.c:293 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc_trace+0x2d7/0x750 mm/slab.c:3618 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] aa_alloc_file_ctx security/apparmor/include/file.h:60 [inline] apparmor_file_alloc_security+0x168/0xaa0 security/apparmor/lsm.c:438 security_file_alloc+0x4c/0xa0 security/security.c:884 __alloc_file+0x12a/0x470 fs/file_table.c:105 alloc_empty_file+0x72/0x170 fs/file_table.c:150 dentry_open+0x71/0x1d0 fs/open.c:894 open_related_ns+0x1b0/0x210 fs/nsfs.c:177 __tun_chr_ioctl+0x48d/0x4690 drivers/net/tun.c:2901 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3179 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fdb72a10c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fdb72a116d4 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 000000000000894c RDI: 0000000000000005 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 00000000004d1308 R14: 00000000004c6aa2 R15: 0000000000000003 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 29a95287927ee20d ]--- RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90 Code: c0 e8 8a 23 b2 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 80 48 15 88 ff 75 d0 41 57 e8 5a 38 98 ff <0f> 0b e8 5f 23 b2 ff e8 8a 6e f5 ff 8b 95 5c fe ff ff 4d 89 e0 31 RSP: 0018:ffff88019b5ced50 EFLAGS: 00010086 RAX: 000000000000005f RBX: ffffffff881545a0 RCX: ffffc9000909e000 RDX: 0000000000000000 RSI: ffffffff8164f825 RDI: 0000000000000005 RBP: ffff88019b5ceda8 R08: ffff8801b94e2400 R09: fffffbfff12b29d4 R10: fffffbfff12b29d4 R11: ffffffff89594ea3 R12: ffffffff88154ac0 R13: ffffffff881546e0 R14: ffffffff881545a0 R15: ffffffff881545a0 FS: 00007fdb72a11700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000140 CR3: 00000001d09ec000 CR4: 00000000001406e0